1. Berlin, B. (1968). Tzeltal numeral classifiers. The Hague Mouton.
2. Berlin, B., Breedlove, D. E., & Raven, P. H. (1974). Principles of Tzeltal plant classification. Academic.
3. Chomsky, N. (1991). Language and problems of knowledge. The Managua lectures. The MIT Press.
4. Clark, H. H. (1973). Space, time, semantics, and the child. In T. E. Moore (Ed.), Cognitive development and the acquisition of language (pp. 27–63). Academic.
5. Cowan, W., & Rakušan, J. (1985). Source book for linguistics. Benjamins.